NGC 1333 Chandra X-Ray Point Source Catalog

NGC 1333 Chandra X-Ray Point Source Catalog NGC1333CXO ivo://nasa.heasarc/ngc1333cxo NASA/GSFC HEASARC Getman et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source NGC 1333, a highly active star formation region within the Perseus molecular cloud complex, has been observed on 2000 July 12.96 - 13.48 with the ACIS-I detector on board the Chandra X-Ray Observatory. The aim point of the array was 3 29 06.1, +31 19 38 (J2000,0 RA and Dec), the satellite roll angle was 95.7 degrees, and the effective exposure time after removing time intervals contaminated by background flaring was 37.8 ks. In this image with a sensitivity limit in luminosity of ~1028 erg/s for X-ray sources at the 318 pc distance of NGC 1333, 127 X-ray sources were detected, most with sub-arcsecond positional accuracy. While 32 of these sources appear to be foreground stars and extragalactic background objects, 95 X-ray sources are identified with known cluster members. The X-ray luminosity function of the discovered young stellar object (YSO) population spans a range of log LX ~= 28.0 - 31.5 erg s-1 in the 0.5 - 8 keV band, and the absorption column densities range from log NH ~=20 to 23 cm-2. Most of the sources have plasma temperatures between 0.6 and 3 keV, but a few sources show higher temperatures up to ~7 keV. Comparison with K-band source counts indicates that all of the known cluster members with K < 12 and about half of the members with K > 12 were detected. (K ~= 11, the peak of the K-band luminosity function, corresponds to 0.2 - 0.4 M_solar stars for a cluster age of ~1 Myr). Seven of the 20 known YSOs in NGC 1333 which are producing jets or molecular outflows were detected, as well as one deeply embedded object without outflows. No evident difference in X-ray emission of young stars with and without outflows is found. This present table contains X-ray, optical and near-infrared information on the 109 X-ray sources that were detected above a source significance threshold of 1 x 10-6 in any of 3 energy bands: soft: 0.5 - 2.0 keV, hard: 2.0 - 8.0 keV, or full: 0.5 - 8.0 keV, excluding 8 sources that were deemed to be spurious on visual examination of the images. The faintest on-axis source emerging from the wavelet detection procedure has 5 extracted counts, corresponding to a source of log LX ~ 28.0 in the total (0.5 - 8.0 keV) band for a source with negligible interstellar absorption (AV ~ 1) and a typical source spectrum of a kT ~ 1 keV thermal plasma. This limit increases to 28.6 (29.3) if the absorption is increased to AV ~ 5 (10). The sensitivity decreases by a factor of 4 at the edge of the field compared to the central regions. 80 of the significant 109 sources (73%) have counterparts in a non-X-ray band. This table does not include 18 tentative X-ray sources listed in Table 3 of the reference paper that were found by the authors by searching for concentrations of photons spatially coincident with known sources from near-IR, mm/sub-mm, and radio catalogs of this region which did not reach the detection significance given above. Most of these tentative sources are believed to be real sources. This table was created by the HEASARC in March 2007 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJ/575/354">CDS catalog J/ApJ/575/354</a> files table1.dat and table2.dat. This is a service provided by NASA HEASARC . 2002ApJ...575..354G https://heasarc.gsfc.nasa.gov/W3Browse/all/ngc1333cxo.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ngc1333cxo& GET text/xml 180 99999 true 52.26975 31.19263889 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ngc1333cxo GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ngc1333cxo&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 Infrared Optical X-ray public ngc1333cxo NGC 1333 Chandra X-Ray Point Source Catalog name Catalog Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable imag KPNO Image I-Band Magnitude mag phot.mag;em.opt.I double nullable count_rate Average Source Count Rate ct/s phot.count;em.X-ray double nullable log_lx_tot_corr_limit Limit Flag for Logarithm of Corrected Total-Band Luminosity char nullable log_lx_tot_corr Log of Total-Band Luminosity Corrected for Estimated Interstellar Absorption log(erg/s) double nullable log_nh_upper Logarithm of the (Best-Fit + 1-Sigma) Hydrogen Column Density log(H-atoms/cm^2) double nullable off_axis Distance from the Aimpoint of ACIS Field (arcmin) arcmin instr.offset double nullable offset_usnoa2_cxo Offset between X-Ray and USNO-A2.0 (<I/252>) Positions If Listed (arcsec) arcsec double nullable bii Galactic Latitude degree pos.galactic.lat double nullable log_lx_hard Logarithm of Hard-Band (2-8keV) Luminosity log(erg/s) double nullable p97_number Preibisch (1997A&A...324..690P) Source Number short nullable jh_color Lada et al. (1996AJ....111.1964L) J-H Color Index mag double nullable br2001_flag Flag [Y] Indicates Visible in Bally & Reipurth (2001ApJ...546..299B) char nullable source_number Sequential Identification Number for Each X-Ray Source in Catalog meta.id short nullable log_lx_soft_limit Limit Flag for Logarithm of Soft-Band Luminosity char nullable te_plasma_limit Limit Flag for Best-Fit Plasma Temperature char nullable alt_name Alternative Catalog Source Designation meta.id char nullable variability_class Variability Class char nullable te_plasma_upper (Best-Fit + 1-Sigma) Plasma Temperature (keV) keV double nullable log_lx_tot Logarithm of Total-Band (0.5-8keV) Luminosity log(erg/s) double nullable extraction_radius Event Extraction Radius (arcsec) arcsec double nullable log_nh_limit Limit Flag for Logarithm of the Model Hydrogen Column Density char nullable bck_counts Extracted Full-Band (0.5-8keV) Background Counts ct short nullable lal96_flag Flag Indicates Blended Cases Where ACIS Resolved Close Double Unresolved in IR char nullable notes_flag Flag Indicates Note Code on Other Counterparts short nullable counts Extracted Full-Band (0.5-8keV) Counts from Event Extraction Radius ct phot;em.X-ray short nullable hj83_number Herbig & Jones (1983AJ.....88.1040H) Optical Counterpart Number, HH NNA short nullable kmag Lada et al. (1996AJ....111.1964L) K-Band Magnitude mag double nullable log_lx_tot_limit Limit Flag for Logarithm of Total-Band Luminosity char nullable asr_number Aspin et al. (1994, Cat. <J/A+AS/106/165>) NIR Counterpart Number short nullable psf_fraction Fraction of Source Events within Event Extraction Radius double nullable log_lx_soft Logarithm of Soft-Band (0.5-2keV) Luminosity log(erg/s) double nullable te_plasma_lower (Best-Fit - 1-Sigma) Plasma Temperature (keV) keV double nullable te_plasma Best-Fit Plasma Temperature (keV) keV double nullable imag_flag I Magnitude Flag: y=saturated star, C=confused region char nullable log_nh Logarithm of the Best-Fit Hydrogen Column Density log(H-atoms/cm^2) double nullable lal96_number Lada et al. (1996AJ....111.1964L) NIR Counterpart Number short nullable hk_color Lada et al. (1996AJ....111.1964L) H-K Color Index mag double nullable source_flag Flag Indicates Notes on Non-Standard Spectral Fits or Source Location char nullable log_nh_lower Logarithm of the (Best-Fit - 1-Sigma) Hydrogen Column Density log(H-atoms/cm^2) double nullable lii Galactic Longitude degree pos.galactic.lon double nullable log_lx_hard_limit Limit Flag for Logarithm of Hard-Band Luminosity char nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable